Gem Guides Book Company
Publishes data about rocks, minerals, gemstones, geology, fossils, dinosaurs, gem trails, rock collecting, jewelry crafts, and more.
John F. Rakovan – Geology Professor
Specializes in environmentally significant processes such as crystal growth, metal sorption, trace element partitioning and other surface mediated reactions.
Mineral Resources Program
Features funds for information related to mineral resources in Eastern, Central, and Western America.
Provides information on the siliceous rock and its various applications.
Source for rock and mineral photography.